Power screw-press.



No. 700,046. Patented May-I3, 1902.

H. J. HINDE.

POWER SCREW PRESS.

(Application fl1ed.Apr. 16. 1901.)

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UNITED STATES PATENT OFFICE.

' HENRY J. HINDE, OF TOLEDO, OHIO.

POWER SCREW-PRESS.

SPECIFICATION forming part of Letters Patent No. 700,046, dated May 13, 1902.

Application filed April 16, 1901 Serial lilo. 56,140- (No model.)

To all whom it may concern:

Be it known that I, HENRY J. HINDE, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in'Power Screw-Presses, consisting in both a combination of elements previously used and well known and new ele ments not heretofore so used and known; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it apas will; be hereinafter, fully described and claimed.

In the accompanying drawings,-l igure l is a perspective view of a power-press embodying the features of the presentinvention. Fig. 2 is a partial side elevation and sectional view of the said press, the sectional portion being taken upon the central plane of the press. Fig. 3 is a frontelevation of a portion of the press,illustrating one style of cam-plate which maybe employedfor automatically reversing; the press-operatingmechanism. Figs. 4 and 5 are detail views in section and elevationof the said cam-plate. Figs. 6 and 7 are detail sectional and bottom plan views of the scre w-' threaded bushing for engaging the screw-ofthe press. Fig. Sis a detail perspective view of a cam block or piece such as is illustrated in 1 of the drawings, and Fig. 9 is a side elevation 'of the upper-and lower cam-blocks shown in Fig. 1, together with the rod and lever for operating the same.

In using presses which are operated by power it is very desirable tohave themso constructed that they'caiinot accidentally be op= erated to toogreat an extent either when their pressheads are lowered or raised. It is necessary, therefore, to construct such a press a with mechanism for automatically stopping rounding it.

the descent of the press-head at the proper point, and it is also desirable to have such mechanism so arranged that the press-screw vwill be reversed and automatically caused to riseto its normal position, and, further, to provide means for stopping the ascent of the same. I preferably accomplish these purposes by forming the press with means for throwing the press mechanism into and out of engagement withthe source of power used for operating thesame.

As shown in the drawings, I form the press with a main frame 1, preferably of a single 'castingprovided with a bed-plate 2 and adapted'to support between its side portions a movable head 3, which is raised and lowered in the said frame by means of the screw 4. An auxiliary frame 5, also preferably formed of a single casting, is secured by bolts or otherwise to the top of, the frame 1 and is adapted to carry the mechanism for actuating the screw, together with the devices employed for shifting the application of power thereto.

'lhe screw 4 is made of a size commensurate with thestrength required for operating the press-head and passes' through an aperture 6, formed in the arched portion of the main frame 1. The aperture 6 is made of snfficient size 'to permit of the passage of the threads on the screw through the same without the said I threads touching the portion of the framesur- In order to properly engage the screw at this point, so that when a rotary motion is imparted to the same the screw will be reciprocated, I mount an internally-screwthreaded bushing 7 within the aperture 6, the'said aperture being somewhat enlarged for the greater portion of its length to accommodate said bushing. The bushing will be shouldered against an annular shoulder 8, formed in the enlarged portion of the aperture 6, while the lower end of the bushing is formed with a flange 9, adapted to fit against the under surface of the main-frame arch, as at 10. The lower flanged end of the bushing '7 is preferably made square, asishown in Fig. 7, and its opposite edges upon two of its sides are preferably beveledlsome'what, so as to' correspond with beveled faces 11 11,formed in the under surface of the main-frame arch. These beveled faces 11 are, however, sufficiently far apart to permit of the bushing being inserted in its seat and the head 9 thereof being brought into position, with its beveled edges opposing the beveled faces 11 11. There will thus be left a space between each beveled edge of the said bushing-head and the adjacent beveled faces 11 upon the frame. By inserting keys 12 12 between the beveled faces thus brought together the bushing may be firmly secured in position in its seat. This forms an important feature of the invention and is a very desirable structure, since it obviates the necessity of screwing the bushing into place, as is commonly done in such instances, and makes it possible to quickly remove and replace a bushing. A bushing thus secured in position, however, is as securely held in place as if it were put there in a much more laborious and. expensive way.

The upper end of the screw 6 is preferably made smooth and projects through a bearing 13, formed in the auxiliary frame 5. The

screw-shaft preferably projects beyond the bearing 13 and carries at its upper end a balance member of some kind, preferably a comparatively heavy fly-wheel, as at 14, whereby the proper momentum may be secured when the screw is being operated. Beneath the bearing 13 is arranged a gear-wheel 15, which is preferably a worm-gear, adapted to mesh with a worm or other corresponding gear 16, secured to an actuating-shaft 17, which finds bearings in the auxiliary frame 5. The wormgear 15 is preferably secured to the smooth portion of the screw 4vby means of splines, as 18 18, which are arranged in suitable keyseats formed in the screw-shaft, so that the screw-shaft will be free to move up and down through the worm-gear, but will be rotated by the same when the same worm-gear is actuated. The worm-gear 15 preferably rests upon a bearing-collar 19, which, as shown in Fig. 2 of the drawings, is formed with an aperture the greater portion of which is large enough to receive the threaded portion of the screw-shaft, the upper portion of the said collar only being contracted sufficiently to engage the screw-shaft so as to properly center the said collar in place. The worm-gear 15 is thus revolubly supported a proper distance above the arch of the main frame. The upper side of the worm-gear 15 is preferably engaged by the lower edge of a bushing 20, arranged within the bearing-box 13. The shaft 17 is preferably arranged horizontally and extends a sufficient distance beyond its bearings upon each side of the auxiliary frame 5 to receive driving-pulleys 21 and 22 and idler-pulleys 23 and 24. The driving-pulleys are preferably arranged next to the framing,while the idler-pulleys are located outside the same. By connecting the fixed pulley upon one side of the machine by means of a straight belt with a power-shaft and the fixed pulley upon the other side of the machine by means of a crossbelt with the said power-shaft the cross-shaft 17 may be driven in either direction for turning the screw 4 in oue,direction or the other,

according to the way in which it is desired to feed the said screw in the machine. Of course when one belt is operatinga fixed pulley the other belt should be upon the idler on the other side of the machine, and vice versa. It will thus be seen that by shifting one of the belts upon its fixed pulley the screw can be turned so as to force the presshead downwardly. By returning this belt to its idler the press may be stopped at a suitable time,and by bringing the other belt upon its fixed pulley the press-head may be raised again to its normal position. The pulleys 21 and 23 at one end of the cross-shaft may be made smaller than the pulleys 22 and 24 at the other end thereof. This is advantageous, since the smaller pulleys can be moved more rapidly than larger ones and accomplish the lifting of the screw in the frame more quickly than the said screw is moved downwardly. It is not necessary when raising the screw to use a great deal of power, and so the smallerpulleys operate sufficiently well for the purpose. lVhen the screw is being forced downwardly, however, for performing the pressing operation, it is well to have pulleys of a greater radius, and therefore of greater leverage upon the shaft, and it is not particularly needful to move the shafts so rapidly when the screw is fed downwardly as when it is lifted.

The means for shifting the belts in connection with the position of the press-head or plunger 3 constitutes an important feature of my invention. Each belt is adapted to be controlled by a reciprocating shiftingrod, as 25 and 26, which are mounted in bearings upon the auxiliary frame 5. The outer end of each of these shifting-rods is provided with a fork for engaging its respective belt, so that by moving the said shafts longitudinally the belts will be moved back and forth between their fixed and idler pulleys. The upper shifting-rod 25 is formed with a projection or stud, as at 27, adapted to be engaged bya cam groove or path 28, formed in a cam-block 29. Said cam-block 29 is pivoted upon the auxiliary frame 5 and is connected with suitable operating means, as will be hereinafter described. The lower shifting-rod 26 is provided with a stud 30, which engages a cam groove or path 31, formed on the face of a cam-block 32, also pivoted upon the auxiliary frame. A link 33 pivotally connects the inner ends of the cam-blocks 29 and 32. The lower cam-block 32 is also connected with an operating-rod 34, which extends downwardly along the side of the main frame 1 to apoint below the press head or plunger The lower end of the rod 34: is pivotally secured to a hand-operated lever 35, which is fulcrumed to the main frame 1. By moving the lever 35 up or down the cams 29 and 32 can be rocked oppositely on their pivots seas to shift the proper belt upon its fixed pulley for producing the desired movement of the screwshaft. Each groove 28 is formed with an in so that when one stud is engaged by the in-- clined grooves of one block the other block the said wrist-pins 47 48.

will have its incline moved away from the stud and not actuate the same. The same is true of the reversed movement of the blocks. As above intimated, however, it is necessary,

or at least desirable, to have these parts automatically actuated at times, according to the position of the plunger 3. The rod 34 is therefore pivotally connected, by means of a lever 36, with a rock-shaft 38, mounted in a bearing 39 upon the frame 1. To the inner end of the rock-shaft 38 is secured an arm 40, which is adapted at its end to be engaged by projections or lugs 41 and 42, secured upon the plunger 3. These lugs are so positioned upon the said plunger with respect to the arm 40 that when the plunger has descended a suitable distanceafter having been put into action the lug 41 will engage the said arm 40 and force it downwardly, thereby causing the lever 36 to pull the rod 34 downwardly, which will cause the cams 28 and 32 to reverse the positions occupied by the shifting-rods 25 and 26, so that the downward movement of 3 -movement will be begun.

the plunger will be arrested and-its upward \Vhen the plunger '3 has been raised to a suitable height in the machine, the lug 42will raise the arm-40, so that the cams will be again actuated, this time being brought to an intermediate position, so that the actuating-belts will be left upon the idler-pulleys and will cease to communicate motion to the machinery. The end of the arm 40 which is engaged by the lugs 41 and 42 may be, if desired, provided with an antifriction-roller 43 for preventingexcessive wear at this point and reducing friction. By this mechanism it isonly necessary to start the operation of the press-screw by moving the lever 35, after which the remaining movement of the said screw will be automatically taken care of by the shifting cams and their controlling mechanism.

In Figs. 3, 4, and 5' I have illustrat-ed'a slightly-dilferent mechanism for controlling the shitting-rods. In this instance a single cam-plate, as 44, is employed, having camrecesses 45 and 46 at its upper and lower ends. These cam-recesses are engaged by wrist-pins 47 and 48, carried by levers 49 and 50, which are pivoted to the auxiliaryframe 5 at their lower ends and to the shitting-rods 25 and 26 at their upper ends. Each of the slots 45 and 46 are provided with elongated straight portions, as at 51 and 52, extending toward each other,'the outer ends of the said slots being bent .to one side to have a' cam action upon The cam-plate 44 is connected by means of a pin-and-slot connectionywith the frame of the machine, so

that it canbe moved up and down thereon.

When the cam-plate is at an intermediate point, the wrist-pins 47 48 will occupy the positions indicated in dotted lines in Fig. 5that is, at the outer ends of the elongated straight portions of the said slots. When'the cam-plate is pulled downwardly, the wrist-pin 47 will be actuated by the cam portion of the slot 45 for moving the upper shifting-rod, the elongated straight portion of the lower slot 46 permitting such movement without the actuation of the lower wristpin 48. When the cam-plate is moved upwardly from its intermediate position, the cam portion of the lower slot 46 will actuate the lower wrist-pin 48 and move the lower shifting-rod laterally, theelongated straight portion of the upper slot permitting of such movement without the actuation of the upper wrist-pin 47. 'When the cam-plate is brought to its intermediate position, the shifting-rods will always be brought to the positions necessary for holding the actuatingbelts upon the idler-pulleys. The motion of the press can thus always be arrested by bringing the cam-plate to its intermediate position. The cam-plate is connected with a rod 53, arranged upon the side of the frame 1, in the same manner as the rod 34. The lower end of this rod is connected with an operat ing-lever 54. This rod 34 is also engaged by a lever or arm 55, secured to the rock-shaft 56 on the front of the machine, the said rockshaft carrying an arm 57, provided with a wrist-pin 58. The wrist-pin 58 is adapted to be struck and operated by an upper adj ustable lug 59 and a lower adjustable lug 60. The operation of the rock-shaft 56 by means of the lugs 59 and 60 is practically the same as the operation of the rock-shaft 38 by the lugs 41 and 42. The lugs 41 and 42 and the lugs 59 and 60 should be adjustable upon. the plunger 3,and are therefore secured by means of bolts to the said plunger, the heads of the said bolts moving in a vertical slot 61, formed on the said plunger. By loosening the bolts the lugs may be adjusted to different positions in the said slot and by tightening the bolts they may-be held in their adjustedpositions.

The plunger 3 is constructed in any suitable manner and is guided in its movement by ways formed upon the main frame 1. In the upper surface of the plunger is formed a recess 62, which is adapted to receive the lower end of the screw-shaft 4. A head, as 63, is secured upon the lower end of said screw-shaft 4, preferably by screwing the same thereon, as illustrated. The plunger is secured to the end of the screw by means of a collar 64, which is secured in a recess 65, formed in the upper surface of the plunger. I-preferably interpose antifriction bearingrings 66 66 between the said collar and the head 62.. I also place thin antifriction-disks 67 between the .end' of the screwshaftand the said plunger. By this arrangement a good movable connection is formed between the screw-shaft and the plunger, and yet friction at this point is largely overcome.

From the above description it will be evident that I am enabled to produce a poweroperated press which though simple in construction is completely within the control of an operator and is provided with means for automatically regulating certain of its movements. Of course it will be apparent that the apparatus can be varied in many particulars without departing in the least from the spirit of the invention.

WVhile I have shown in the drawings and described in the specification a worm-gearing for transmitting motion from the power-shaft to the screw, I do not wish to be understood as limiting myself to this precise type of gearing, since it will be evident that I could employ spiral gears, beveled gears, or spur-gears with a very slight change in the arrangement of the parts without departing from the spirit of theinvention. It will also be evident that, although the drawings show the shifting-bars as arranged upon both sides of the machine, they could be arranged so that they might both be operated from one side of the machine, all within the spirit of the present invention.

The making of the main frame of a single casting and also the making of the auxiliary frame of a single casting contributes largely to the strength of the machine and reduces the expense of producing it.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a press, the combination with a suitable frame and a reciprocating plunger mounted therein, of ascrew-shaft for moving the said plunger, gearing for operating the said shaft, an actuating-shaft mounted upon the frame and adapted to engage oppositelymoving belts, shifting-rods adapted to engage the said belts, rocking cam-blocks engaging the said shifting-rods, means for moving both the cam-blocks back and forth in opposite directions to each other simultaneously, comprising a bar connecting them, whereby the screw-shaft may be moved in either direction, or may be brought to a standstill, substantially as described.

2. In a press, the combination with a suitable frame, and a reciprocating plunger mounted therein, a screw-shaft for moving the plunger, mechanism for connecting the said screw shaft with oppositely moving power-belts, shifting-rods engaging the said belts, rocking cam-blocks engaging the said shifting-rods for reciprocating them, a bar connecting both the said cam-blocks together said bar being connected with means arranged in the path of a projection on the plunger, whereby the belts may be automatically moved to arrest the descent of the plunger and reverse its motion, said means also operating to automatically arrest its upward movement, substantially as described.

3. In a press, the combination with a suitable frame, and a reciprocating plunger mounted. therein, a screw-shaft for moving the plunger, mechanism for connecting the said screw shaft with oppositely moving power-belts, shifting-rods engaging the said belts, cam-blocks engaging the said shiftingrods for reciprocating them, means connected with the said cam-blocks and arranged in the path of a projection on the plunger, whereby the belts may be automatically moved to arrest the descent of the plunger and reverse its motion, said means also operating to automatically arrest its upward movement, substantially as described.

4. In a press, the combination with aframe and a reciprocating plunger-screw, of a shaft for driving said screw, belts for actuating the shaft in different directions, shifting-rods engaging the said belts, pivoted cam-blocks, having cam-grooves formed in their faces, and adapted to engage wrist-pins on the said shifting-rods, rods connecting the said camblocks with each other and with a hand-lever, a rock-shaft mounted upon the frame of the machine and connected with the said rods, an actuating-arm on one end of the said rockshaft, lugs carried by the plunger and adapted to engage the said arm for automatically operating the belt-shifting mechanism to correspond with the position of the plunger in the machine, substantially as described.

5. In a press, the combination with a frame, a reciprocating plunger mounted therein, of shafting and gearing for operating the same, belt-shifting rods for controlling the application of power to the said mechanism,pivoted cam-blocks having cam-grooves upon their faces adapted to engage projections on the shifting-rod, the said cam-blocks being arranged to swing in opposite directions from each other, rods for operating them simultaneously,means forimparting movement to the rods from the plunger, the structure being such that when the plunger is at its lowest point one of the cams will be moved so as to actuate its shifting-rod and apply one belt so as to drive the machine in one direction, and When the plunger is moved in the other direction the other cam will be operated to produce an opposite movement of the parts, the structure also being arranged to bring the said mechanism to rest at the proper time, substantially as described.

6. In a press, the combination with a reciprocating plunger, of mechanism for moving the same up and down, cam-blocks for controlling the application of power to the said mechanism through the agency of belts, a rock-shaft for operating the said cam-blocks, an arm on the said rock-shaft, adjustable lugs mounted on the said plunger, adapted to contact with said arm, bolts for adj ustably securing the said lugs to the plunger, the said bolts engaging a longitudinally arranged groove upon the plunger, the structure being such that the lugs may be so set that the plunger will be arrested iu'iits downward movement and reversed at the propertime, and

will be stopped in its upward movement at a proper point,-substantiall'y as described.

7. A press comprisinga main frame, a reciprocating plunger mounted therein, a screwshaft for'moving the same up and down, a

bushing, having internal threads adaptedto engage the threads upon the screw-shaft, the said bushingbeing seated in a recess formed in the main frame, the said bushing having a head formed with beveled edges adapted to be brought opposite inclined faces on the main frame, and keys of a suitable size to fit between the beveled edges and the inclined faces by the insertion of which the bushing Will be securely locked in position in the main 0 

